![Apple iPhone X](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-95117ac0-ced4-47fc-b9ba-99cc89ad9582.png?width=150&height=320)
Apple iPhone X
iOS 16.0
1. Find "SIM PIN"
Press Settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-364d27fb-2246-43bd-b253-dc49279a7b24.png?width=208&height=454)
Press Mobile Data.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-95d3f47a-eaaf-4578-af29-4c0de6b084b6.png?width=208&height=454)
Press SIM PIN.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-e05ce67f-991f-421c-9bd3-4fe015bbc622.png?width=208&height=454)
2. Turn use of PIN on or off
Press the indicator next to "SIM PIN" to turn the function on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-ef826797-7eaf-43f0-a01c-a64dbd98594b.png?width=208&height=454)
Key in your PIN and press Done.
If an incorrect PIN is entered three times in a row, your SIM will be blocked. To unblock your SIM, you'll need to key in your PUK. You can get the PUK by calling customer services on 191 from a Vodafone mobile phone. If you're using a land line, you need to dial 03333 040 191. Please note: If you key in the wrong PUK ten times in a row, your SIM will be blocked permanently. In this case, you need a new SIM from Vodafone.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-651ec7e9-e4a0-4ac1-a56e-f5494d77de60.png?width=208&height=454)
3. Return to the home screen
Slide your finger upwards starting from the bottom of the screen to return to the home screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-ef826797-7eaf-43f0-a01c-a64dbd98594b.png?width=208&height=454)